Corrective time controlled system



April 11, 1944.

F. Q. RAST CORRECTIVE TIME CONTROLLED SYSTEM Filed Nov. 18, 1939 3 Sheets-Sheet l I NVENTOR BY ATTORNEY April 11, 1944. F. Q. RAST V CORRECTIVE TIME CONTROLLED SYSTEM Filed Nov. 18, 1939 5 Sheets-Sheet 3 FIG.5.. 1334567890123456789 ml/rs or MINUTES aw TENS OF MINUTES CAM TEA/5 0F MINI/r63 PRINTING METH IN VENTOR ATTORNEY Patented Apr. 11, 1944 CORBECTIVE TIME CONTROLLED SYSTEM Frederick Q. Rast,'Binghamton, N. Y., asslgnor to International Business Machines Corporation, New York, N. Y., a corporation of New York Application November 18, 1939, Serial No. 305,082

7 Claims.

This invention relates to corrective time controlled systems and more particularly to improve-v ments in secondary apparatus for use in such a system, and it has for a general object to provide apparatus of this type which is of improved construction and arrangement of parts.

A further object is to provide a secondary apparatus of the type including a plurality of time indicating elements and including an improved means for controlling the reception of periodic normal and corrective impulses from a master clock.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a section through the stamp just inside the print head taken on line l-l, Fig. 3.

Fig. 2 is a sectional view through the printing wheels taken online 2--2, Fig. 1.

Fig. 3 is a top plan view of the stamp with the cover broken away for clearness.

Fig. 4 is a wiring diagram showing the circuits of the master clock for sending minute impulses and corrective impulses to the time mechanism of the time stamp.

Fig. 5 is a graphic representation of the cams on the units of minute and tens of minute wheels.

Fig. 6 is a detail view of the cams which control the transfer contacts and their feelers.

The improved form of secondary apparatus comprising the present invention is shown in the drawings as advantageously embodied in a time stamp. The time stamp comprises a base 2| in which is pivotally mounted a platen 22 and to which is pivoted at 23 an arm 24. This arm comprises two parts suitably secured together by cross members.

Referring to Fig. 2, a shaft 25 supported in bosses extending inwardly from the sides of the arm 24 supports a plurality of type Wheels identified as the units of minutes wheel 26, tens of minutes 21, hours 28, day 29, month 30 and year 3|. A gear 32 is mounted adjacent to the units of minutes wheel 26 and is secured thereto by a clip 33 so thatthe gear 32 and wheel 25 rotate in unison.

2 and 3) connects the disc 34 to an armature 38 of a magnet 39 and a spring 40 normally holds the parts in the positions in which they appear in Figure 1, with a projection of the link against a stop 4|. Energization of the magnet 39 rocks the armature 38 clockwise (Fig. 1) drawing the link 31 toward the right and rocking the disc 34 counterclockwise. When the magnet 38 is de-energized, the spring 40 restores the link 31, armature 38 and the disc 34 to their normal positions.

The oscillatory movement of the disc 34 is utilized to advance the units of minutes wheel 26. The magnet 39 is energized once each minute in a manner hereinafter set forth and consequently actuates the disc 34 once per minute.

A spring-pressed pawl 42 pivotally carried on the disc 34 cooperates with a pinion 43 supported on a stud 44 projecting inwardly from the arm 24. The pinion 43 also meshes with the gear 32. Every other tooth of the pinion 43 is cut off opposite the disc 34 and this disc is provided with a tooth space or notch 45.

During the counter-clockwise movement of the disc 34 th pawl 42 wipes by the pinion 43, the disc 34 looking the pinion against rotation. When the disc 34 is rotated clockwise the nose of the pawl 42, being slightly in advance of the notch 45, engages the pinion 43 rotating said pinion wheel 30.

counter-clockwise. During this movement the notch 45 engages the next tooth on th pinion 43 completing the two space rotation thereof. This advances the gear 32 and units of minutes wheel 26 two teeth or one type space.

Transfer is efiected between the type wheels 26 and 21, 21 and 28, and 28 and 29 by Geneva transfer pinions 8, 1, and 8, respectively (Fig. 2). The pinions are mounted on brackets 9, l0, and H, respectively, supported between the shaft 25 and a rod 52 mounted in a bar 53 extending between and secured to the sides of arm 24. The month and year wheels 30 and 3|, respectively, may be manually set, there be no transfer provided from the day wheel 29 to the month Such transfer mechanism may, however, be easily provided. The bar 53 carries a printing plate 53a to print data other than that printed by the type wheels.

The manner in which the time stamp is used will be apparent to those skilled in the art. When it is desired to stamp the date and time on a sheet of paper, or other object, the paper is inserted between the arm 24 and platen 22, and the arm 24 then manually depressed to effect the impression on the paper of the date and time minutes wheel 21.

manifestin type carried by the wheels 26 to M, inclusive, which are then in printing position. The usual inked ribbon 48 is disposed between the type and paper and effects the printing in the well known manner.

In the diagram (Fig. 4) there is shown a master clock which may be of any conventional type with the usual time train which drives a minute arbor 95 causing said arbor to make one rotation per hour; There are two cams 91 and 98 on this arbor, the cam 91 controlling contacts 99 and the cam 98 controlling contacts I00. The

B. Energization of relay I05 closes contacts I01 so that impulses fiow from battery B over line III to the secondary, throughmagnet 39 e also Figs. 1 and 3), contacts I09, contacts I01 to battery B. Energization of the magnet 39 (Figs. 1, 3, and 4) advances theunits of minutestype wheel one space as previously described. When the contacts I00 close at 50 seconds before the 60th minute more rapid impulses are sent by the contacts I04 to the relay I05. The rapidly repeated energization of this relay sends a plurality of successive impulses .to the secondary for the purpose of advancing the time mechanism of any secondaries which are slow.

' minute through relay I05 and back to the battery- The secondary referred to above, comprises the magnet 39 (Figs. 1, 3, and 4) the time wheels or type wheels 26 to 31!, inclusive, and the mechanism whereby the magnet 39 advances the type wheels.

To control the reception of the impulses in the secondary transfer contacts I09 and H0 (Figs. 1, 3, and 4) are provided under the control of the units of minutetype wheel 26 and the tens of minute wheel 21. Reference to Figure 3, discloses that these wheels have cam grooves formed in their peripheries. Figure 5 graphically indicates these grooves and Figure 6 shows the profile of the actual cams. A feeler H2 (Fig. 6) pivoted on the rod 52 cooperates with the cam on the units of minutes wheel 28 and a feeler I I3 also pivoted on the rod 52 and rigidly connected to the feeler H2 by a yoke il cooperates with the cam on the tens of minutes wheel 21.

Extending upwardly from the feeler H2 is an arm I I5 having pivoted to its upper end a link I I B through the opposite end of which link projects the center contact of the transfer contacts I09 "H3 are so shaped that the feelers and the arm "-5 areheld in the position indicated in Figure 6 in connection with the showing of the tens of This through the link IIG holds the contacts I09 closed until the 59th minute when both feelers H2 and 3 drop into the low position of their receptive cams under the influence of the spring tension of the center contact. This opens contacts I09 and closes conasaaers ers H2 and I I3 are cammed out opening contacts I I0 and closing contact I09.

Those secondaries which are on time or which are in synchronism with the master clock or those which are fast when they arrive at the 59th minute open contacts I09 and close H0 and are thus unaifected by the corrective impulses which start when contacts I00 close seconds before the th minute because the contacts 99 closed at 10 minutes and 10 seconds before the 60th minute energizing magnet I06 and opening the contacts I08. At ten seconds before the 60th minute the contacts 99 open permitting contacts I08 to close so that the 60th minute impulse is transmitted over the contacts I91, contacts I03, contacts III) now closed to energize the magnet 39 which advances the units oi'minutes wheel 25 to the zero position. At this time a transfer is eliected from the units of minutes wheel 28 to the tens of minutes wheel Z'I advancing the latter also to zero position. Transfer is also efiected at the same time between the tens of minutes wheel 21 to the hour wheel 28 advancing this wheel to the next hour.

The secondary orsecondaries which are slow have not shifted the contacts "IQ-H0 at the time the correction impulses are transmitted by contacts I04. Consequently these impulses through relay I05 repeatedly close contacts I01 which send impulses over contacts I09 to the magnet 39 until the secondary clock which is slow arrives at the 59th minute when contacts I09- I I0 shift. The contacts I08 being open at this time no further impulses are received by magnet 39 until the 60th minute impulse is sent as described above.

While there has been shown and described and pointed. out the fundamental novel features of the invention as applied to a single modification it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the artwithout departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. In a secondary apparatus for use in a, corrective time controlled system, a plurality of time indicating elements, an impulse magnet to receive periodic impulsesfrom the corrective time system for normally advancing said indicating elements at a rate to indicate correct time, sensing means for determining the positions of said elements, and means controlled by the sensing means and operated conjointly by a plurality of the indicating elements to control the reception of said impulses by said magnet.

2. In a secondary apparatus for use in a corrective time controlled system, a plurality of time indicating elements, an impulse magnet to receive periodic impulses from said system for normally advancing said elements and also to receive corrective impulses from said system, and mechanical position sensing means conjointly operated by two of the time indicating elements when said elements are in predetermined chronological positlons for controlling the reception of both classes of impulses by said magnet to efiect synchronization between said apparatus and said system.

3. In a secondary apparatus for use in a corrective time controlled system wherein time con trol is effected by periodic impulses originating from a master clock, the combination of a plurality of time indicating wheels, a drive motor adapted to be energized by the master clock 'impulses, drive mechanism connected to said motor and operable-to advance the indicating wheels at predetermined rates which are proportional to the rate at which impulses are received by said motor so as normally to cause said wheels to indicate the correct time of day, a cam integral with each of said wheels for movement therewith, and means conjointly controlled by a plurality of said cams for superseding the normal master clock control of the operation of the drive motor, therebyto effect synchronization between said apparatus and said system.

4. In a scondary apparatus for use in a cor rective time controlled system wherein time control is effected by periodic impulses from a master clock, the combination of a plurality of denominational order time manifesting elements, a drive motor adapted to be energized by the master clock impulses, drive mechanism connected to said motor for advancing the lowest order element a predetermined amount for each energization of the motor so as normally to cause said elements to indicate the correct time of day, a plurality of cam members individually associated with the manifesting elements and synchronized therewith, and means controlled conjointly by the cam member associated with the.

lowest order element and by another of said cam members associated with another of the time manifesting elements for modifying the master clock control of the operation of the drive motor motor so as normally to cause the elements to indicate correct time, sensing means for sensing the positions of said elements, and means operated by the sensing means according to the positions of the sensed elements for causing the indicating elements to be operated at a different than normal rate in accordance with the nature of the variance of the time indicated by said elements with the correct time of the master clock. 6. A secondary time unit adapted for use in a master clock impulse-controlled time sytsem comprising, in combination, a plurality of time indicating elements, a drive motor adapted to be energized by periodic impulses from the master clock, drive mechanism connected to said motor for advancing the time indicating elements;

regulating means for said elements including a plurality of cams, each individually connected with one of the elements for movement therewith, and means controlled conjointly by said cams and effective at predetermined intervals to modify the master clock control of the drive motor.

7. In a secondary apparatus for use in a corrective time controlled system wherein time control is efiected by periodic impulses from a master clock, a plurality of movable time indicating elements, a drive motor adapted to be energized by said impulses from said master clock, drive mechanism connected to said motor and operable to advance the indicating elements at predetermined rates which are proportional to the rate at which impulses are received by said motor as normally to cause said elements to indicate by their respective positions the correct time of day, and means controlled conjointly by the respective positions or two of said time elements and operable to modify the normal master clock control of the operation of said drive motor when the time indicated by the position 01' said elements differs from that indicated by the master clock so that the positions of said elements will be'changed to indicate the same time as the 3 master clock.

FREDERICK Q. RAST. 

